L52 FUNGOID PESTS OF CULTIVATED PLANTS. 



those mixtures is therefore recommended, especially the first ; but promp- 

 titude must be used whilst the mildew is on the leaves, since it is useless 

 when it has obtained a hold upon the fruit to attempt to save the crop. 



. Syll. i. 8; Cooke Hdbk. No. 1911 ; Berk, Gard. Chron. 1854, 

 p. 286; Journ. B.H.S. xxv. (1900), p. 182, figs. 35, 36; Journ. Q.M.C. 

 1904, p. (30. 



PESTS OF THE VINERY AND STOVF 



The two sections of this communication treat of the fungoid diseases 

 (1) of the Vine, and (2) of other plants cultivated in the hothouse. The 

 pests which flourish at this high temperature seldom cause any trouble 

 under other circumstances ; but the close, heated, and moist atmosphere 

 of the stove is especially favourable to the development of fungus para- 

 sites, and great care should be taken to recognise their earliest appear- 

 ance, and hold them in check. 



Vine Leaf-spot. 

 Septoria Badhcmi (Berk.), PI. XIII. fig. 2. 



This is not a common parasite, although we met with it several times 

 about twenty years ago. 



It was first recognised in 1858, forming little brownish spots on the 

 leaves, upon which were seated a few of the dot-like conceptacles, which 

 occur in clusters on either side of the leaf. On one occasion we found 

 the spots to be wholly marginal, becoming confluent around the greater 

 portion of the leaf. The conidia, or sporules, are elongated or some- 

 what club-shaped (35-50 /x long), with a few r minute granules, and they 

 appear to be rarely, if ever, septate. 



Syll. iii. 2581 ; Cooke, Hdbk. No. 1309 ; Berk. & Br., Ann. N.IL. 

 No. 748, t. 15, f. 9; Thiim. I'll:. Wein. p. 180. 



Small Vine Leaf-spot. 

 Phyllosticta Badharm (Cooke), PI. XIII. fig. 1. 



Not fewer than fifteen other kinds of leaf-spots have been described as 

 Occurring "li living vim-haves, in addition to nine species of anthracnose. 

 This is a formidable List; but only one other has occurred in Britain, 

 which answered in externa] appearance to the above description of 

 Septoria Badhami, vrith the distinction that the conidia, or sporules, were 



minute (6 7x2//); and, as we issued specimens of it under that name, we 



have since called it Phyllosticta Badhami. (Journ. B.H.S. 1878, p. 98.) 



The other described ipecies of Vine leaf spot maybe briefly enume- 

 rated hi i< . a "ii' or other of them may occur at any time. 



Italian Leaf-spot, Phoma Negriana (Thiim. ), on living vino-leaves in 

 Italy, has sporules 5-7 X 8 '•>[, y. 



Mildew Leaf-spot, Phoma succedanea (Pass.), on vine-leaves in company 

 with the mildew, has occurred in Italy with sporules 5 x2^/t. 



